JPH0786233B2 - Steel pipe pile press-fitting machine and its moving method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a press-fitting machine for press-fitting a steel pipe pile into the ground and a method for moving the same.

(Prior Art) In a conventional steel pipe pile press-fitting machine, as shown in FIG. 14, a plurality of clamps 101 for holding an existing steel pipe pile P are hung under a saddle 102, and a mast 103 provided on the saddle 102 is suspended. A chuck 104 is provided at the front so as to be vertically movable. At the time of press fitting, the steel pipe pile P is gripped by the chuck 104, and the chuck 104 is lowered while taking a press fitting reaction force by the clamp 101. In the conventional machine, the total length is extremely higher than the top end of the steel pipe pile, and the weight is large.

(Problems to be Solved by the Invention) The conventional device is large in size and requires a large amount of movement and storage during construction. In addition, since the saddle, mast, etc. protruded more than the top of the existing steel pipe pile, the bridge 90
At the construction site, such as below, there was a hindrance to the work of continuously press-fitting steel pipe piles while moving by themselves.

(Means for Solving the Problems) In order to solve the above problems, the steel pipe pile press-fitting machine of the present invention is provided with an elevating mechanism in a holding mechanism that presses and holds an existing steel pipe pile from the inside, and a horizontal mechanism is provided above the elevating mechanism. A press-fitting mechanism that forms a press-fitting mechanism that press-fits a steel pipe pile that extends in the direction, and an elevating mechanism in the holding mechanism that presses and holds the existing steel pipe pile from the inside,
A moving means provided with a horizontal moving mechanism capable of moving in the horizontal direction is formed above the lifting mechanism, and the press-fitting mechanism of the press-fitting means and the horizontal moving mechanism of the moving means are connected to each other.

It is characterized in that the press-fitting mechanism of the press-fitting means is constituted by a sandwiching body for sandwiching the grip of the press-in steel pipe pile or a sandwiching body for sandwiching the outer peripheral surface of the press-in steel pipe pile.

The moving method of the steel pipe pile press-fitting machine of the present invention is such that the holding mechanism of the moving means and the holding mechanism of the press-fitting means are inserted and fixed to the inner upper end of the adjacent existing steel pipe pile, and then the press-fitting steel pipe pile is held by the press-fitting mechanism of the press-fitting means. Then, the elevating mechanism of the moving means and the press-fitting means is lowered to press-fit the press-fitted steel pipe pile into the ground. After press-fitting, the holding of the steel pipe pile by the press-fitting means is released, the holding mechanism is moved to above the existing steel pipe pile, the horizontal moving mechanism advances one steel pipe pile, and then the holding mechanism is lowered and press-fitted immediately before. Insert it in the steel pipe pile and fix it. After that, the holding state of the moving means is released, the lifting mechanism of the moving means raises the steel pipe pile to above the existing steel pipe pile, then advances by one steel pipe pile and then lowers, and is inserted and fixed in the steel pipe pile. And

Further, a lifting mechanism is provided in a holding mechanism that presses and holds the existing steel pipe pile from the inside, and a press-fitting mechanism that forms a press-fitting mechanism that press-fits the steel pipe pile that extends horizontally in the upper part of the lifting mechanism, and the existing steel pipe pile. An elevating mechanism is provided in a holding mechanism that is pressed and held from the inside, and a moving unit having a horizontal moving mechanism that can move in the horizontal direction is formed on an upper part of the elevating mechanism. After the holding mechanism is inserted and fixed to the inner upper end of the existing steel pipe pile, the holding of the steel pipe pile by the holding mechanism of the moving means is released. After that, the lifting mechanism of this holding mechanism moves it to a position above the existing steel pipe pile, and the horizontal movement mechanism moves it backward and lowers it to insert and fix it in the steel pipe pile. After that, the holding state by the holding mechanism of the press-fitting mechanism is released, the lifting mechanism of the holding mechanism raises it to the upper side of the existing steel pipe pile, moves backward and then lowers, and is inserted and fixed in the steel pipe pile. .

Further, a lifting mechanism is provided in a holding mechanism that presses and holds the existing steel pipe pile from the inside, and a press-fitting mechanism that forms a press-fitting mechanism that press-fits the steel pipe pile that extends horizontally in the upper part of the lifting mechanism, and the existing steel pipe pile. An elevating mechanism is provided in a holding mechanism that is pressed and held from the inside, and a moving means having a horizontal moving mechanism capable of horizontal movement is formed on the upper part of the elevating mechanism. The holding mechanism of the moving means and the holding mechanism of the press-fitting means of the steel pipe pile press-fitting machine that is connected to the moving mechanism are inserted and fixed to the inner upper end of the existing steel pipe pile respectively, and then the holding of the steel pipe pile by the holding mechanism of the press-fitting means is released. To do. After that, the lifting mechanism of this holding mechanism moves it to above the existing steel pipe pile, and the horizontal movement mechanism advances and lowers it to insert and fix it in the steel pipe pile. After that, the holding state by the holding mechanism of the moving means is released, the lifting mechanism of this holding mechanism raises it to the upper side of the existing steel pipe pile, advances it and then lowers it, and is inserted into the steel pipe pile and fixed. .

In addition, when press-fitting in hard ground, etc., the existing steel pipe piles that are used as reaction force piles are prevented from rising by connecting and fixing the subsequent existing steel pipe piles.

(Operation) The holding mechanism of the moving means and the holding mechanism of the press-fitting means are inserted and fixed to the inner upper end of the adjacent steel pipe pile. Next, the press-fitting steel pipe pile is held by the press-fitting mechanism of the press-fitting means, and the elevating mechanism of the moving means and the press-fitting means is lowered to press-fit the steel pipe pile into the ground.

After press-fitting, the holding mechanism of the press-fitting means is activated to release the steel pipe pile, and when the holding mechanism of the press-fitting means is raised to move to the upper end of the existing steel pipe pile, the horizontal movement mechanism is activated to make the press-fitting means one steel pipe pile. Move forward by a minute. After the forward movement, the holding mechanism of the press-fitting means is inserted and fixed in the steel pipe pile press-fitted immediately before.

Then, the holding mechanism of the moving means is released, and it is lifted above the existing steel pipe pile. Next, the moving means is advanced by one horizontal pipe pile by the horizontal moving mechanism, and then the holding mechanism is inserted and fixed in the upper end of the steel pipe pile by the elevating mechanism of the moving means. This work is repeated to move the steel pipes on the pile row.

(Embodiment) FIG. 1 shows a front view of a first embodiment of the present invention. The present embodiment comprises a press-fitting means 11 for a steel pipe pile and a moving means 1 for moving the press-fitting means 11 forward or backward by itself.

The moving means 1 comprises a holding mechanism 3 for an existing steel pipe pile, a lifting mechanism 4, and a horizontal moving mechanism 5. This holding mechanism 3 is a holding body 2.
And a fluid pressure cylinder 3a and a rod 3b provided in the holder 2. The holder 2 is provided with an outer cylinder 4c and an inner cylinder 4d that is vertically slidable with respect to the outer cylinder 4c.

The elevating mechanism 4 is provided with a cylinder 4a and a rod 4b in the outer cylinder 4c and the inner cylinder 4d, and a horizontal moving mechanism 5 is provided at the upper end of the rod 4b.

The horizontal movement mechanism 5 is provided with an outer cylinder 5c and an inner cylinder 5d slidable back and forth with respect to the outer cylinder 5c, and a fluid pressure cylinder 5a and a rod 5b provided in the outer cylinder 5c and the inner cylinder 5d. The outer cylinder 5c is axially attached to the upper ends of the rod 4b and the inner cylinder 4d. The fluid pressure cylinder 5a may be attached to the upper portion of the outer cylinder 5c, and the rod 5b may be attached to the upper portion of the inner cylinder 5d. Further, a turning means for the lifting mechanism 4 may be provided in the holding body 2 so that the entire horizontal movement mechanism 5 can be turned in the horizontal direction. In the figure, reference numeral 6 is an undulating cylinder, which is used as a press-fitting means 11 when self-propelled on a steel pipe pile row.
Adjust the inclination angle of the steel pipe pile to.

The press-fitting means 11 for the steel pipe pile includes a holding mechanism 13, a lifting mechanism 14, a press-fitting mechanism 15, and a support rod 18.

The holding mechanism 13 is a cylindrical holding body 12 that can be inserted into a steel pipe pile.
And a fluid pressure cylinder 13 provided on the outer periphery of the holder 12.
It consists of a and rod 13b. An insertion hole having an H-shaped cross section is formed in the center of the holding body 12, and a support rod 18 having an H-shaped cross section is arranged in the insertion hole so as to be vertically movable as shown in FIG.
A press-fitting mechanism 15 for a press-fitting steel pipe pile P3 is attached to the upper end of the support rod 18.

Further, in this embodiment, the lifting mechanism 14 is provided on both sides of the insertion hole. The lifting mechanism 14 is composed of a fluid pressure cylinder 14a and a rod 14b. The cylinder 14a is fixed in the holding body 12, and the holding body 19 of the supporting rod 18 is axially attached to the upper end of the rod 14b. The holding body 19 has a support rod 18 extending through the center thereof, and a pair of holding claws 20 for holding the support rod 18 from both sides.
Are provided facing inward.

Further, the press-fitting mechanism 15 forms an insertion portion 17 of the grip 70 at the front end of the holding body 16 and internally installs a pair of holding claws 17a so as to face each other, and holds the grip 70 from both sides.

The number of fluid pressure cylinders used in each mechanism of the present invention is not limited, and one or two or more fluid pressure cylinders are used. A method of press-fitting a steel pipe pile using this embodiment will be described.

After arranging the press-fitted steel pipe pile P3 adjacent to P2, the holder 2 of the moving means 1 is placed inside the existing steel pipe pile P1 and the holder of the press-fitting means 11 is also provided.
12 is inserted into the existing steel pipe pile P2, and the rods 3b and 13b are extended to fix the holding body 2 to the upper end of the steel pipe pile P1 and the holding body 12 to the upper end of the steel pipe pile P2.

The grip 70 of the steel pipe pile P3 is inserted into the insertion portion 17 of the press-fitting mechanism 15, and is held and fixed by the holding claw 17a.

Then, the support rod 18 is held by the holding claws 20 of the holding body 19, and when both the rod 4b and the rod 14b are retracted at the same time in this state, the holding body 16 at the upper end of the support rod 18 is lowered, and accordingly the steel pipe pile P3 is formed. It is pressed into the ground. Repeat this work to completely press fit the long steel pipe pile. Especially at sites with obstacles in the upper part, short piles will be added to make it long.

Next, a method of moving the steel pipe pile press-fitting machine of this embodiment on the pile will be described with reference to FIGS. 3 to 7.

After the press-fitting of the steel pipe pile P3 is completed, the holding mechanism 13 of the press-fitting means 11 is operated to release the pinched state of the steel pipe pile P2, and the rod 14b is retracted to move the holding body 12 above the steel pipe pile P2 (3rd See figure).

Then, the inner cylinder 5d of the moving means 1 is extended, and the holding body 12 is advanced to above the steel pipe pile P3 that was press-fitted immediately before (see FIG. 4). Then, the rod 14b is extended and the holder 1 of the press-fitting means 11 is extended.
2 is lowered and fixed inside the steel pipe pile P3 (see Fig. 5).

Further, the holding state of the steel pipe pile P1 by the holding mechanism 3 of the moving means 1 is released, the rod 4b of the elevating mechanism 4 is retracted, and the holding body 2 is raised above the steel pipe pile P1 (see FIG. 6).
The rod 5b of the horizontal moving mechanism 5 is retracted as it is, and the moving means 1 is moved to above the steel pipe pile P2 (see FIG. 7). Then, the rod 4b of the lifting mechanism 4 is extended to hold the holding body 2.
Is lowered and inserted into the steel pipe pile P2 and fixed. As a result, the device advances by one steel pile and returns to the initial state shown in FIG.

By repeating the above operation, the steel pipe pile press-fitting machine self-moves on the steel pipe pile row while sequentially inserting new steel pipe piles into the ground. Reverse operation is the reverse of forward operation. After completion of the movement, the moving means 1 and the steel pipe pile press-fitting means 11 can be separated.

8 to 10 show another embodiment of the press-fitting mechanism.

FIG. 8 is a front view of the press-fitting mechanism 25, in which reference numeral 26 is a pressing body. The pressing body 26 is an extension of the front end of the holding body 16, and presses the top end of the steel pipe pile P by pressing it. According to the present embodiment, it is not necessary to hold the steel pipe pile P, the structure is simplified, and the pressing force is evenly applied to the top end of the steel pipe pile to prevent the inclination of the steel pipe pile during press fitting.

The press-fitting mechanism 30 shown in FIG. 9 has a pair of support arms 31, 31 that can be opened and closed by rotating about a shaft 31a at the end of a semicircular support 31b provided at the front end of the holding body 16. There is. This support arm 3
A pair of movable claws 34, 34 are formed in the insides 1, 31, and a pair of fixed claws 33, 33 facing the movable claws 34, 34 are formed on the support portion 31b side.
Then, the fixed claw 33 is operated by the fluid pressure cylinder to hold the outer peripheral surface of the steel pipe pile P from both sides. According to this press-fitting mechanism 30, since the outer peripheral surface of the press-fitting steel pipe pile can be uniformly supported, there is no risk of the press-fitting direction being eccentric.

11 and 12 show another example of the press-fitting means. The press-fitting means 41 includes an existing steel pipe pile holding mechanism 43, an elevating mechanism 44, and a press-fitting steel pipe pile press-fitting mechanism 45. The holding mechanism 43 includes a cylindrical holding body 42 that is inserted into an existing steel pipe pile, a fluid pressure cylinder 43a provided in the holding body 42, and a rod 43b. During operation, the rod 43b is extended to press and support the existing steel pipe pile P11 from the inner peripheral surface.

The elevating mechanism 44 is composed of a pair of fluid pressure cylinders 44a and a rod 44b, the cylinder 44a is installed in the holding body 42, and the press-fitting mechanism 45 is attached to the upper end of the rod 44b. As the rod 44b extends and retracts, the press-fitting mechanism 45 causes the holder 4 to move.
Move up and down with respect to 2.

The press-fitting mechanism 45 has substantially the same structure as the press-fitting mechanism 15, but instead of this, the press-fitting mechanisms 25 and 30 may be attached to the upper end of the rod 44b. It goes without saying that the horizontal moving mechanism 5 of the moving means 1 can be connected to the rear end of each press-fitting mechanism.

FIG. 13 is a front view of the second embodiment of the present invention. In this embodiment, the steel pipe pile includes the press-fitting means 41 and the moving means 51 for moving the press-fitting means 41 forward, and the press-fitting means 41 and the moving means 51 are connected by a second elevating mechanism 68.

The moving means 51 comprises a holding body 52, a boom guide 57 standing upright on the upper end of the holding body 52, and a boom 55 vertically movably mounted along the boom guide 57.
A first elevating mechanism 54 is installed between the holding body 52 and the holding body 52.

An outer cylinder 56c and a middle cylinder 56d are provided in the boom 55, and a horizontal movement mechanism including a fluid press-fitting cylinder 56a and a rod 56b in each outer cylinder.
A second lifting mechanism 68 is provided on the rod 56b and the end of the middle cylinder 56d. The elevating mechanism 68 includes a fluid pressure cylinder 68a and a rod 68b. The rod 68b has an upper end fixed to the inner cylinder 56d and a lower end of the fluid pressure cylinder 68a fixed to the holder 42 of the press-fitting means 41.

Particularly, in this embodiment, the holders 42, 52 are moved in and out of the steel pipe pile by the three lifting mechanisms 44, 54, 68. Therefore, the third
The holders 42, 52 can be moved in and out of the existing steel pipe pile more quickly than in the embodiment, and the press-fitting of the steel pipe pile can be performed more quickly.

In addition, the upper end of each steel pipe pile press-fitted into the ground is a connecting fitting.
Connection is fixed by 80. The means for connecting and fixing the connecting fitting 80 is by screwing with bolts and nuts,
Alternatively, a method such as welding may be used. This connecting fitting 80 ensures a reaction force at the time of press fitting to facilitate the work of inserting the steel pipe pile according to each of the above embodiments.

(Effect of the Invention) According to the present invention, the holding mechanism and the like are housed inside the existing steel pipe pile and do not protrude from the top end of the press-fitted steel pipe pile. Therefore, the overall height of the steel pipe pile press-fitting machine can be kept low to make it compact, and the steel pipe pile can be surely press-fitted even at a construction site with an obstacle above.

In addition, by using the steel pipe press-fitting machine composed of moving means and steel pipe pile press-fitting means, and connecting and using each, it is possible to continuously press-fit the steel pipe piles while self-propelled on the existing steel pipe piles in the places with upper obstacles. There is an effect such as being able to.

[Brief description of drawings]

The drawings show embodiments of the present invention. FIG. 1 is a front view of a first embodiment of a steel pipe pile press-fitting machine, FIG. 2 is a plan view of the same, and FIG.
FIGS. 7 to 7 are explanatory views of the same operation, FIG. 8 is a front view of another embodiment of the press-fitting mechanism, and FIGS. 9 and 10 are front views and plan views of another embodiment of the press-fitting mechanism. FIG. 12 is a front view of another embodiment of the press-fitting means, FIG. 12 is a plan view thereof, FIG. 13 is a front view of a second embodiment of a steel pipe pile press-fitting machine, and FIG. 14 is a front view of a conventional example. 1, 51 ... Moving means, 11, 41 ... Press-fitting means 2, 12, 42, 52 ... Holding body 3, 13, 43 ... Holding mechanism 4, 14, 44 ... Elevating mechanism 5 ... Horizontal moving mechanism, 6 ... Pressing body 15 , 25, 45 ... Press-fitting mechanism 16, 19 ... Holding body, 18 ... Support rod

Claims (9)

[Claims] Claims: 1. A press-fitting means in which an elevating mechanism is provided in a holding mechanism for pressing and holding an existing steel pipe pile from the inside, and a press-fitting mechanism for press-fitting a horizontally extending steel pipe pile is formed on the upper part of the elevating mechanism. An elevating mechanism is provided in a holding mechanism that presses and holds the steel pipe pile from the inside, and moving means provided with a horizontal moving mechanism capable of moving horizontally in the upper part of the elevating mechanism is formed, and the press-fitting mechanism and the moving means of the press-fitting means are provided. Steel pipe pile press-fitting machine that is connected to the horizontal moving mechanism of. 2. The steel pipe pile press-fitting machine according to claim 1, wherein the press-fitting mechanism of the press-fitting means is constituted by a sandwiching body for sandwiching a grip of the press-fitting steel pipe pile. 3. The press-fitting mechanism of the press-fitting means is constituted by a sandwiching body for sandwiching the outer peripheral surface of the press-fitting steel pipe pile.
The described steel pipe pile press-fitting machine. 4. The press-fitting mechanism of the press-fitting means comprises a pressing body for pressing the upper end of the press-fitting steel pipe pile.
The described steel pipe pile press-fitting machine. 5. The horizontal moving mechanism of the moving means is detachably connected to the press-fitting mechanism of the press-fitting means.
The steel pipe pile press-fitting machine according to 2, 3, or 4. 6. After inserting and fixing the holding mechanism of the moving means and the holding mechanism of the press-fitting means into the inner upper end of the adjacent existing steel pipe pile,
The press-fitting steel pipe pile is held by the press-fitting mechanism of the press-fitting means, and the elevating mechanism of the moving means and the press-fitting means is lowered to press-fit the press-fitting steel pipe pile into the ground. After press fitting, the holding of the steel pipe pile by the press fitting means is released, and after moving this holding mechanism to above the existing steel pipe pile,
After the steel pipe pile is moved forward by one horizontal movement mechanism, the holding mechanism is lowered and inserted and fixed in the steel pipe pile that has been press-fitted immediately before. After that, the holding state of the moving means is released, the elevator mechanism of the moving means raises it to the upper side of the existing steel pipe pile, then advances by one steel pipe pile and then lowers to insert and fix it into the steel pipe pile. How to move the machine. 7. A press-fitting means in which a lifting mechanism is provided in a holding mechanism for pressingly holding an existing steel pipe pile from the inside, and a press-fitting mechanism for pressing in a horizontally extending steel pipe pile is formed on the upper part of the lifting mechanism, and An elevating mechanism is provided in a holding mechanism that presses and holds the steel pipe pile from the inside, and moving means provided with a horizontal moving mechanism that can move in the horizontal direction is formed on the upper part of the elevating mechanism. Holding mechanism for the moving means and holding mechanism for the press-fitting means of the steel pipe pile press-fitting machine, which is connected to the horizontal moving mechanism, are respectively inserted and fixed at the upper inner end of the existing steel pipe pile, and then the holding means for the holding means holds the steel pipe pile. To cancel. After that, the lifting mechanism of this holding mechanism moves it to a position above the existing steel pipe pile, and the horizontal movement mechanism moves it backward and lowers it to insert it into the steel pipe pile and fix it. After that, the holding state of the holding mechanism of the press-fitting mechanism is released, the lifting mechanism of this holding mechanism raises it to above the existing steel pipe pile, and then it moves backward and then lowers to insert and fix it into the steel pipe pile. How to move. 8. A press-fitting means, wherein a lifting mechanism is provided in a holding mechanism that presses and holds an existing steel pipe pile from the inside, and a press-fitting mechanism is formed on the upper part of the lifting mechanism to press-fit a horizontally extending steel pipe pile. An elevating mechanism is provided in a holding mechanism that presses and holds the steel pipe pile from the inside, and moving means provided with a horizontal moving mechanism capable of moving horizontally in the upper part of the elevating mechanism is formed, and the press-fitting mechanism and the moving means of the press-fitting means are provided. After holding and fixing the holding mechanism of the moving means and the holding mechanism of the press-fitting means of the steel pipe pile press-fitting machine connected to the horizontal moving mechanism of the steel pipe pile to the inner upper end of the existing steel pipe pile, respectively, the holding of the steel pipe pile by the holding mechanism of the press-fitting means. To cancel. After that, the lifting mechanism of this holding mechanism moves it to above the existing steel pipe pile, and the horizontal movement mechanism advances and lowers it to insert and fix it in the steel pipe pile. After that, the holding state by the holding mechanism of the moving means is released, and the elevating mechanism of this holding mechanism raises it to above the existing steel pipe pile, moves it forward and then lowers it, and inserts and fixes it in the steel pipe pile. How to move. 9. The method for moving a steel pipe pile according to claim 6, 7 or 8, wherein after the steel pipe pile is press-fitted, the steel pipe pile just press-fitted and the subsequent existing steel pipe pile are fixed to increase the reaction force.